NWS Key West

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Last Map Update: Tue, Dec 30, 2025 at 3:08:21 pm EST

Watches, Warnings & Advisories

National Weather Service National Weather Service

National Weather Service Tampa Bay Area, FL

National Weather Service Miami - South Florida

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Cold Weather Advisory

Small Craft Advisory

Arctic Air Mass Approaching

Island Chain

Marine Winds

Wave Heights

Small Craft Advisory in Effect!
Affected Areas: Outer Gulf Waters, Bayside and Nearshore Waters, Western Florida Straits, and Western Hawk Channel
Most Hazardous Conditions: Seas 2-3 ft, building to 3-6 ft in Western Waters. Most Hazardous Winds: Building to NW-N 20-25 knots

Breezy Conditions and lows in the 50s Expected
Line of clouds across the Gulf show an approaching cold front
Gusts over 20 mph expected across the island chain through tomorrow
Temperatures dropping to lows in the 50s overnight
Breezy conditions forecast to come to an end on New Year's Day

LOWER & MIDDLE KEYS: TODAY...Partly sunny with a slight chance of showers this morning, then becoming mostly sunny this afternoon. Becoming breezy. Highs in the lower 70s early, then slowly falling temperatures. Northwest winds 5 to 10 mph early, becoming northwest to north 15 to 20 mph. Chance of rain 10 percent.
UPPER KEYS: TODAY...Partly sunny with a slight chance of showers this morning, then becoming mostly sunny this afternoon. Highs in the lower 70s early, then slowly falling temperatures. Northwest winds 5 to 10 mph early, becoming northwest to north and increasing to 10 to 15 mph this afternoon. Chance of rain 10 percent.

Small Craft Advisory in Effect for Western Florida Straits, Western Hawk Channel, Outer Gulf Waters, and Nearshore Waters
Small Craft Should Exercise Caution for all other waters!
TODAY...
NW to N light to gentle breezes, becoming fresh to strong in western waters. For Eastern waters, increasing to moderate to fresh breezes. Seas; 2 to 3 feet, building to 3 to 6 ft in Western Straits, Nearshore waters, Outer Gulf, western Hawk Channel. Seas building to 2 to 3 feet in the Eastern waters of Florida Straits, Hawk Channel. Bay and Nearshore waters smooth to a light chop, becoming choppy to very rough. Isolated Showers

Small Craft Advisory in Effect for Western Florida Straits, Western Hawk Channel, Outer Gulf Waters, and Nearshore Waters
Small Craft Should Exercise Caution for all other waters!
TODAY...
NW to N light to gentle breezes, becoming fresh to strong in western waters. For Eastern waters, increasing to moderate to fresh breezes. Seas; 2 to 3 feet, building to 3 to 6 ft in Western Straits, Nearshore waters, Outer Gulf, western Hawk Channel. Seas building to 2 to 3 feet in the Eastern waters of Florida Straits, Hawk Channel. Bay and Nearshore waters smooth to a light chop, becoming choppy to very rough. Isolated Showers